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Finding the Fourth Proportional to 72,886.50, 109,329.88 and 20,295.98

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Solution

The fourth proportional to 72,886.50, 109,329.88 and 20,295.98 is: 30,444.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,886.50 : 109,329.88 = 20,295.98 : x
  2. Step 2: Convert to fraction form
    72,886.50/109,329.88 = 20,295.98/x
  3. Step 3: Cross multiply
    72,886.50x = 109,329.88 × 20,295.98
  4. Step 4: Simplify right side
    72,886.50x = 2,218,957,057.88
  5. Step 5: Solve for x
    x = 2,218,957,057.88/72,886.50
  6. Step 6: Final answer
    x = 30,444.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.